Map Sensor Adapter LS1 & LS2 to LS3

The Holley Map Sensor Adapter LS1 & LS2 to LS3 is an essential component for builders and enthusiasts engaged in LS engine swaps or upgrades within General Motors' small-block platforms. This adapter is specifically designed for those converting older LS1 or LS2 engine bays to accommodate LS3 sensors and electronics, ensuring compatibility and performance.

Constructed from durable aluminum, this adapter measures 2.35 x 2.35 x 4.8 inches and allows LS3 MAP sensors to be mounted on LS1 and LS2 intake manifolds without requiring modifications. It effectively bridges the gap between incompatible manifold absolute pressure sensor designs, preventing check-engine codes and fueling inconsistencies during tuning. Holley's engineering guarantees proper vacuum porting and electrical compatibility, which is crucial for maintaining sensor accuracy.

This adapter is particularly beneficial for LS swappers utilizing LS3 fuel injection controllers on LS1/LS2 long-blocks or upgrading to aftermarket Holley EFI systems. By ensuring seamless integration into engine bay plumbing, it preserves the newer LS3 ECU's ability to self-tune and recognize boost conditions, making it ideal for supercharged or turbocharged applications.